From 7c467d404a200b3153cc7aa2605d1e542bef3da9 Mon Sep 17 00:00:00 2001
From: Tobin Brown <tobinjbrown@gmail.com>
Date: Sun, 14 Feb 2021 03:13:02 -0600
Subject: [PATCH] feat: infer bigint data type (#893)

---
 README.md                                    |  1 +
 src/sequelize/data-type/data-type-service.ts |  2 ++
 test/specs/table_column.spec.ts              | 18 +++++++++++++++++-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 1a7ea3fc..4a98d26f 100644
--- a/README.md
+++ b/README.md
@@ -285,6 +285,7 @@ Design type      | Sequelize data type
  `string`        | `STRING`
  `boolean`       | `BOOLEAN`
  `number`        | `INTEGER`
+ `bigint`        | `BIGINT`
  `Date`          | `DATE`
  `Buffer`        | `BLOB`
 
diff --git a/src/sequelize/data-type/data-type-service.ts b/src/sequelize/data-type/data-type-service.ts
index 00a2190c..5f15bc2f 100644
--- a/src/sequelize/data-type/data-type-service.ts
+++ b/src/sequelize/data-type/data-type-service.ts
@@ -18,6 +18,8 @@ export function inferDataType(designType: any): DataTypeAbstract | undefined {
   switch (designType) {
     case String:
       return DataTypes.STRING;
+    case BigInt:
+      return DataTypes.BIGINT;
     case Number:
       return DataTypes.INTEGER;
     case Boolean:
diff --git a/test/specs/table_column.spec.ts b/test/specs/table_column.spec.ts
index f9fb8738..845d5e13 100644
--- a/test/specs/table_column.spec.ts
+++ b/test/specs/table_column.spec.ts
@@ -1,7 +1,7 @@
 import {expect, use} from 'chai';
 import * as chaiAsPromised from 'chai-as-promised';
 import {ModelAttributes} from 'sequelize';
-import {Model, Table, Column, DataType} from "../../src";
+import {Model, Table, Column, DataType, AutoIncrement, PrimaryKey} from "../../src";
 import {createSequelize} from "../utils/sequelize";
 import {User} from "../models/User";
 import {getOptions} from "../../src/model/shared/model-service";
@@ -197,6 +197,22 @@ describe('table_column', () => {
 
   describe('column', () => {
 
+    it('should infer the correct data type for bigint', () => {
+      @Table
+      class BigIntModel extends Model {
+        @PrimaryKey
+        @AutoIncrement
+        @Column
+        id: bigint;
+      }
+
+      sequelize.addModels([BigIntModel]);
+
+      const attributes = getAttributes(BigIntModel.prototype);
+
+      expect(attributes.id.type).to.equal(DataType.BIGINT);
+    });
+
     it('should create appropriate sql query', () => {
 
       const seq = createSequelize(false);